新增抖音用户基本信息解密

business/auth2/auth2.go

@@ -3,6 +3,7 @@ package auth2
 import (
 	"bytes"
 	"encoding/base64"
+	"encoding/json"
 	"errors"
 	"regexp"
 	"strings"
@@ -316,6 +317,42 @@ func Login(ctx *Context, authType, authID, authIDType, authSecret string) (authI
 	return LoginInternal(ctx, authType, authID, authIDType, authSecret)
 }
 
+// 抖音用户信息解密
+type TikTokDecryptInfo struct {
+	CountryCode     string `json:"countryCode"`
+	PhoneNumber     string `json:"phoneNumber"`
+	PurePhoneNumber string `json:"purePhoneNumber"`
+	Watermark       *struct {
+		AppID     string `json:"appid"`
+		Timestamp int64  `json:"timestamp"`
+	} `json:"watermark"`
+}
+
+func DecryptUserMsg(sessionKey, iv, msg string) (string, error) {
+	decodeMsg, err := base64.StdEncoding.DecodeString(msg)
+	if err != nil {
+		return "", err
+	}
+	decodeIv, err := base64.StdEncoding.DecodeString(iv)
+	if err != nil {
+		return "", err
+	}
+	decodeSessionKey, err := base64.StdEncoding.DecodeString(sessionKey)
+	if err != nil {
+		return "", err
+	}
+
+	userInfo, err := utils.AESCBC16Decrypt(decodeSessionKey, decodeIv, decodeMsg)
+	if err != nil {
+		return "", err
+	}
+	result := &TikTokDecryptInfo{}
+	if err := json.Unmarshal(userInfo, result); err != nil {
+		return "", err
+	}
+	return result.PhoneNumber, nil
+}
+
 // 通过临时TOKEN绑定新创建的用户
 func BindUser(inauthInfo *AuthInfo, user IUser) (outauthInfo *AuthInfo, err error) {
 	if err = AddAuthBind(user, inauthInfo); err == nil {